Exponential $f(R)$ cosmology with massive neutrinos as a dynamical dark energy framework
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| Format: | Preprint |
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2025
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| _version_ | 1866915609265045504 |
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| author | D'Onofrio, Simone Odintsov, Sergei Schiavone, Tiziano |
| author_facet | D'Onofrio, Simone Odintsov, Sergei Schiavone, Tiziano |
| contents | The exponential $f(R)$ gravity model provides a theoretically well-motivated extension of General Relativity, introducing a modified gravitational dynamics at late times consistent with a dynamical dark energy scenario, while recovering the $Λ$CDM-like regime at high redshifts with a smooth transition. Using a Bayesian Markov Chain Monte Carlo (MCMC) analysis, we constrain the parameters of the exponential $f(R)$ model in combination with the total neutrino mass $\sum m_ν$, employing the latest measurements from cosmic chronometers, the DESI DR2 BAO data, the CMB acoustic scale, and the Pantheon+ supernovae compilation, comparing the results with the $Λ$CDM and the $w_0w_a$CDM models. Our results show that the exponential $f(R)$ model remains consistent with current observations while slightly alleviating the Hubble tension and the neutrino mass problem relative to $Λ$CDM, although the constraints on $\sum m_ν$ are tighter than those obtained for the phenomenological $w_0w_a$CDM scenario. These results indicate that the interplay between modified gravity and neutrino physics in the late Universe may offer a viable framework for further investigation of cosmological tensions. |
| format | Preprint |
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arxiv_https___arxiv_org_abs_2511_06924 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Exponential $f(R)$ cosmology with massive neutrinos as a dynamical dark energy framework D'Onofrio, Simone Odintsov, Sergei Schiavone, Tiziano General Relativity and Quantum Cosmology The exponential $f(R)$ gravity model provides a theoretically well-motivated extension of General Relativity, introducing a modified gravitational dynamics at late times consistent with a dynamical dark energy scenario, while recovering the $Λ$CDM-like regime at high redshifts with a smooth transition. Using a Bayesian Markov Chain Monte Carlo (MCMC) analysis, we constrain the parameters of the exponential $f(R)$ model in combination with the total neutrino mass $\sum m_ν$, employing the latest measurements from cosmic chronometers, the DESI DR2 BAO data, the CMB acoustic scale, and the Pantheon+ supernovae compilation, comparing the results with the $Λ$CDM and the $w_0w_a$CDM models. Our results show that the exponential $f(R)$ model remains consistent with current observations while slightly alleviating the Hubble tension and the neutrino mass problem relative to $Λ$CDM, although the constraints on $\sum m_ν$ are tighter than those obtained for the phenomenological $w_0w_a$CDM scenario. These results indicate that the interplay between modified gravity and neutrino physics in the late Universe may offer a viable framework for further investigation of cosmological tensions. |
| title | Exponential $f(R)$ cosmology with massive neutrinos as a dynamical dark energy framework |
| topic | General Relativity and Quantum Cosmology |
| url | https://arxiv.org/abs/2511.06924 |